132) What will be the output of the following JavaScript code? Which is true about the JavaScript statement var x = 3? Turkey, (+ If the values on either side of '+' operator are numerical values then ___________.
If the object of the "for" loop statement creates a new property on the object, that property is usually not enumerated. United Arab Emirates, (+ 32) 155) What are the different types of Pop up boxes available in JavaScript? Which of the following is true about the alert() function. Answer: B: JavaScript is a high-level programming language. 973) JavaScript is a light-weighted and interpreted language. 119) Which one of the given options can be considered as a code equivalent to the following code? Netherlands, (+ Which of the following function of String object returns the calling string value converted to upper case while respecting the current locale? This is because it runs for the first time before checking the condition, and then executes until the condition becomes false. 224) For example, consider the following given code: However, we can see that in given question only one argument is passed, so it will definitely result in an error. The principles of Graceful Degradation and Progressive Enhancement are implemented differently, but either strategy can successfully be used to accommodate users with older browsers. Explanation: In JavaScript, as the only particular case of the "new" operator, the grammar is simplified by JavaScript by allowing the parentheses to be removed when there are no arguments passed in the function calling. Here you can access and discuss Multiple choice questions and answers for various competitive exams and interviews. 122) Which one of the given options can be considered as the correct output of the following code? However, there is an exception in JavaScript, dividing zero with zero will not have any defined number/value so, the result of this specific operation is a special value "Not a Number" (or NaN) and printed as NaN. So, to find the location of the error and to correct that, developer setups the breaking points at the doubted code using the debugger window. 48) 27) 52) Which one of the following is correct output for the following javascriptcode: Explanation: In JavaScript, the alert method does the typecasting and converts the value of the variable "valueinit" to a string after that it concatenates both of the strings and displayed them on the screen. 49) The significant advantage of using this method is instead of making changes in the existing array it returns a newly created array. Explanation: In JavaScript, if user defines an array and does not define value of any element, there will be no error. 
97) What is the primary role of the "return ()" statement in a function body? This avoids manipulation/change in all existing values, properties, and attributes. a. a screen reader used for Accessibility purposes for the visually impaired. Terms T&C. The constructor of the Person class is called constructPerson. However, it is a directive that is introduced in the ECMAscript5 version of the javascript. This method is used to remove the data elements from the beginning and return it along with the new length of array. 34) Which one of the following is used for the calling a function or a method in the JavaScript: Explanation: The invocation expression is one of the JavaScript's syntax which is used for making a function call or calling a method.
41)
Egypt, (+ It stored the value returned by the function in an accumulator. Portugal, (+ Poland, (+ Attempt a small test to analyze your preparation level. Here, the alert method concatenates both given strings and prints as a single string in the form of output. Russia, (+ 966) Explanation: The method " valueOf()" returns the value of the parameter that was passed in it. Q 22 - Which of the following type of variable takes precedence over other if names are same? 46) Which one of the following is correct output for the following given JavaScript code. 3) Which one of the following also known as Conditional Expression: Explanation: A conditional expression can only evaluate two things, which either true or false, that are purely based on the evaluation of the condition. "Add and Assignment" operator is shown by this symbol. 64) 30) See the given code of JavaScript and choose the correct output from the following: Explanation: In JavaScript, the alert method does the typecasting and converts the value of the variable "valueinit" to a string after that it concatenates both of the strings and displayed them on the screen. Explanation: In general, every object instance has a unique property which indicates the constructor function that created it. Answer: D: "Float" is the correct answer. Explanation: In all cases, where the operator's value is NULL, then unary operator always returns the typeof object. In the "x2" array, we cannot access the index 0 because the "x2" array is declared, but it is not defined till now. When the switch statement is executed, the value of the expression is calculated and compared to the case labels, and looks for a case whose expressions produce the same value after evaluations (where the comparison is determined by the === operator). 116) What will be the correct output of the following JavaScript code? Q 4 - Which of the following is an advantage of using JavaScript? All rights reserved. 149) What would be the output of the following Javascript code? Answer: B: The pop() method is the correct answer. Finland, (+ 152) What are the three crucial manipulations done in a "for loop" on a loop variable in JavaScript? Explanation: The method "Object.getOwnPropertySymbols()" used in the above program, returns a whole array of symbol properties, that are directly found on an object. 230) So, all functions in a given array of functions return the exact same value. Guinea, (+ Guinea, (+ 74) What kind of work is being performed in the following given part of JavaScript's code? It is a distributed database from Apache. 20) 
34) 158) Which of the following built-in method is used to remove the last element from an array and return that element? Turkey, (+ 49) The JavaScript function to place the date on a page is: If you want to execute one set of statements when a condition evaluates to false and another set of statements when the condition evaluates to true,the best statement to use is a(n) _____. 87) Which one of the following options is the correct output for the given code of javascript? In this task, the object's state converted into a string, that also can be restored if needed. Ghana, (+ JavaScript provides reasonable control to the users over the web browsers. 107) Which one of the following options is the correct output for the given code of JavaScript? To access the content written under that id, we have to use the.innerHTML to specify that and finally replace the content with whatever is written inside the quotes. In order to know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use the "isPrototypeOf()" method. The "cbrt()" method is one of the several methods that are found in the library called math's available in the JavaScript. It returns a property's descriptor for that property, which directly presents on an object and not present in the object's prototype of the certain object. 1) 138) Which of the following is the correct syntax to print a page using JavaScript? Generally, the value of the counter variable incremented at the end of the body of the "while" loop, whereas the statements are executed first. The returned value lies in between 0 and PI radians if the passed value exceeds the limit from -1 to 1, the "acos()" methods returns the NaN(also known as Not a Number). While using square brackets, the expression always evaluates to the string, or in the form of a value that is converted into a string. Answer: D: "Cassandra" is the correct answer. Netherlands, (+ You have an image that you wish to place on a web page. 58) If the following piece of JavaScript code is executed, will it work if not, what kind of possible error can occur? Explanation: The Lexical scoping is Standardized in all following given algorithmic languages except the HTML. c. an automated software agent like a web crawler client, 6. Explanation: The strict comparison operator returns true only if the operand are of the same type and content matches. Explanation: The "call()" method mentioned in the above given piece of code, is used of calling a function in which the "this" is passed as an argument.
91) 56) Which one of the given code will be equivalent for the following JavaScript code: Explanation: The variable in the code A working same ( e.g. 75) A set of unordered properties that, has a name and value is called______. Turkey, (+ 102) What happens if the return statement has no related expression? 44) A - A callback is a plain JavaScript function passed to some method as an argument or option. JavaScript has object-oriented capabilities that allows you to build interactivity into otherwise static HTML pages. Explanation: The function "console.log ()" used in the above function is one of the pre-defined functions of JavaScript. It passes the data-items of an array into another array. 31) cookie = 'key1 = value1; key2 = value2; expires = date'. Explanation: The "pop()" method is used for removing the last element of the array, or we can say, it removes/deletes the element from the tail-side of an array. Pakistan, (+ Egypt, (+
351) It was named JavaScript because, at that time, it was made as a scripting language complementary to Java. Calculate current week number in JavaScript, Calculate days between two dates in JavaScript, How to Convert Comma Separated String into an Array in JavaScript, How to create dropdown list using JavaScript, How to disable radio button using JavaScript, Check if the value exists in Array in Javascript, How to add a class to an element using JavaScript, How to calculate the perimeter and area of a circle using JavaScript, How to find factorial of a number in JavaScript, How to get the value of PI using JavaScript, How to make a text italic using JavaScript, How to get all checked checkbox value in JavaScript, How to add object in array using JavaScript, How to check a radio button using JavaScript, JavaScript function to check array is empty or not, Implementing JavaScript Stack Using Array, Event Bubbling and Capturing in JavaScript, How to select all checkboxes using JavaScript, How to add a WhatsApp share button in a website using JavaScript, How to Toggle Password Visibility in JavaScript, Get and Set Scroll Position of an Element, Getting Child Elements of a Node in JavaScript, Remove options from select list in JavaScript, Check if the array is empty or null, or undefined in JavaScript, How to make a curved active tab in the navigation menu using HTML CSS and JavaScript, block that combines a number of statements into a single compound statement, both conditional block and a single statement, The values of count variable are logged or stored in a particular location or storage, The value of count from 0 to 9 is displayed in the console. Explanation: In JavaScript, the "concat()" is a predefined method which is used to join the values of two arrays. Explanation: Code A will return output in the form of a "real" boolean value because we first do what is written inside the parentheses, but then negate it again immediately. Zimbabwe, (+ 263) Another method used in the above-given code is "JSON.parse()", which parses a JSON string, object described by the string or constructing javascript value. A - Client-side JavaScript does not allow the reading or writing of files. 966) Explanation: As we can see in the given code, the "x1" array is defined but with the null values by which we can easily access the index 0,1,2 of it. concat() method returns the character at the specified index. Explanation: The method "acos()" used in the above code returns the arccosine of any number passed in it as an argument. Oman, (+ Sweden, (+ In general, a block of statement has common definition "which combines one or a number of statements into a single statement for ease. Germany, (+ 64) India, (+ Switzerland, (+ If the list of identifiers includes more than one identifier, they are separated by commas. 104) Which one of the following code is equivalent to call a function "x" of the class "a" which have two arguments g and h? 233) The "src" is used to refer to any JavaScript file.
995) It passes every element of the array on which it is invoked to the function you specify, and returns an array containing the values returned by that function. Answer: C: Conditional operator is the correct answer. Yes! \begin{array} {l} \text{Step} & \text{Operation}\\ \text{1} & \text{Get values for NUMBER, $T_{1}, \ldots, T_{10,0000},$ and $N_{1}, \dots, N_{10,000}$}\\ \text{2} & \text{Set the value of i to 1 and set the value of Found to NO}\\ \text{3} & \text{While both (found $=\mathrm{NO} )$ and $(i \leq 10,000)$ do Steps 4 through 7}\\ \text{4} & \text{If NUMBER is equal to the ith number on the list, $T_1$ then}\\ \text{5} & \text{Pint the name of the corresponding person, $N_{1}$} & \text{ }\\ \text{6} & \text{Set the value of Found to yES}\\ & \text{Else (NUMBER is not equal to T)}\\ \text{7} & \text{Add 1 to the value of $i$}\\ \text{8} & \text{If $($ Found $=\mathrm{NO})$ then}\\ \text{9} & \text{Print the message 'Sorry, this number is not in the directory'}\\ \text{10} & \text{Stop}\\ \end{array} JavaScript relies on server-side processing to execute the code. 41) Explanation: In JavaScript, a function is defined by using the "function" keyword along which function is named, followed by the () parenthesis. When we say that JavaScript variables are a dynamically typed we mean that. 992) 234) Mauritius, (+ It skips the upcoming statements in that iteration form where it gets encountered, and instead of exiting the loop, it moves to the next iteration. 8) In the following given syntax of the switch statement, the Expression is compared with the labels using which one of the following operators? 44) Whenever the return statement gets encountered in the definition of the function, the execution of the function will stop, and it returns the stored value to the statement where the function call has been made. User Agreement,Privacy Policy Variable assignment can happen at declaration-time by appending the value to the declaration, or at run time with a simple right-to-left assignment. 45) Which one of the following is correct output for the following given JavaScript code: Explanation: Here the code above uses the "cbrt ()" method, which returns the cube root of the number passed in parentheses as an argument. Tajikistan, (+ 44) Which one of the following is correct output for the following given JavaScript code: Explanation: In the following code, the method "abs ()" is used which returns absolute numbers as output hence the correct option is c. In JavaScript, the "abs ()" method is one of the methods stored in the library called Math's. The object creation expressions are just like the invocation expressions except that they prefixed with a keyword commonly known as New. Idiosyncrasies between various browsers and operating systems make it easy to test for all potential client configurations. 117) What will happen if we execute the following code of JavaScript? 45) Explanation: An array is a collection of different elements that are of the same data-type. 880) 4) Among the following given JavaScript snipped codes, which is more efficient: Explanation: Code 1 will be more efficient. Ghana, (+ Afghanistan, (+ 109) Which one of the following options is the correct output for the given code of JavaScript? Sweden, (+ 20) In the JavaScript, which one of the following is not considered as an error: Explanation: Yes, you heard right that division of any integer by zero is not an error in the JavaScript. Pakistan, (+ As you can see in the above code when the value of variable "i" gets equal to the 3, the "continue" keyword executed and control skips current iteration and jump to the next iteration. This method is used to know whether two values are the same or not. Explanation: The "tofixed()" method formats the given number with a specific number of digits to the right of the decimal. Using typeof operator, we can get the type of arguments passed to a function. 968) So, user can neglect the empty pair of parentheses in every case of constructor invocation, in which there are no arguments. 10) Which of the following is the correct output for the following JavaScript code: Explanation: The "if-else" is one of the conditional statements available in JavaScript like several other languages. 
Mexico, (+ Portugal, (+ Which of the following is the correct comparison operator for equals? 51) Check whether the following given statements for the Strictly equal operator are true or false: a) If the data type of two values are equal, they are Equal. Explanation: Whenever a "return" statement is encountered by the program control inside the function's definition, it stops the execution of that function. A callback is a plain JavaScript function passed to some method as an argument or option. 15) Which of the following variables takes precedence over the others if the names are the same? 143) Which of the following syntax can be used to write "Hello World" in an alert box? 33) 32) Explanation: A program can contain a number of mistakes like syntax errors, logical errors, etc, and for many of them, there are no alert messages and also no indications to find the mistakes. +Infinity in JS gets added with +Infinity then output of the code will be. A - The typeof is a unary operator that is placed before its single operand, which can be of any type. South Africa, (+ Bahrain, (+ The function definition expression (or we can say a function literal) consists of the keyword Function, followed by the set of identifiers(or parameters names) that are separated by commas inside the parenthesis, and a small block of JavaScript code(which we normally called function body/definition) enclosed in the curly braces. There are no other statements to be executed in the definition of the loop,only the value of the variable "x" will be incremented, and the output will be 10. Oman, (+ 973) Bangladesh, (+ Explanation: The "concat()" method is a predefined method of the JavaScript which is used for joining the two or more arrays.
Yes! 31) In JavaScript, what will be used for calling the function definition expression: Explanation: A function definition expression is a kind of "function literal' just like as the object initializer is a kind of "object literal". 20) The variable, constant or literal values and certain language keywords are the basic examples of the primary expressions. Answer: B: It uses === and !== instead is the correct answer.